I know, they are quite different technologies.Since they both provide Layer 2 Data Center switching services, I list them side by side here to highlight their behaviors.
Cheers!
| OTV | FabricPath | |
|---|---|---|
| Encapsulation | Over standard IP packets | Over special frames |
| Edges' Neighbors | All OTV edges | Only some FP switches |
| Diameter of neighbors | 1 hop | Varies |
| Equal-cost Multi-path | IP ECMP | FP ECMP |
| L2 Broadcast/Multicast | Pass | Pass |
| L2 Unknown Unicast | Block | Pass |
| L2 Known Unicast | Pass | Pass |
| Local MAC Table | Learned | Learned |
| Remote MAC Table | Only those Advertised | Only those Conversational |
| ARP caching | Yes | No |
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